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Finding the Fourth Proportional to 18,920.96, 28,252.48 and 16,933.76

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Solution

The fourth proportional to 18,920.96, 28,252.48 and 16,933.76 is: 25,285.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.96 : 28,252.48 = 16,933.76 : x
  2. Step 2: Convert to fraction form
    18,920.96/28,252.48 = 16,933.76/x
  3. Step 3: Cross multiply
    18,920.96x = 28,252.48 × 16,933.76
  4. Step 4: Simplify right side
    18,920.96x = 478,420,715.72
  5. Step 5: Solve for x
    x = 478,420,715.72/18,920.96
  6. Step 6: Final answer
    x = 25,285.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.